Re:The Python Sofware Foundation Receives Wonderfully Welcom...
by kstrauser on Wednesday November 15, 2023 @12:50PM
(#38279829)
Maintaining links is going to be a pain in the neck, sure. I don't mean to make light of it. However, that's kind of inherent with going from one service to another, and not something GitHub's doing to make it artificially harder.
When you're moving from a self-hosted system to a proprietary system, you can do the work yourself to make sure there are redirects from the old URLs to the new ones.
That option isn't likely to be available when you're moving the other way.
I observe that github is happy for you to "bring your own domain" for github pages, but AIUI issue and PR URLs are always under github.com .